Butt-lock



W. E. EMERY.

NUT LOCK.

rue/mon man MAR 2.1918

mwmw, Pamed mym, 1.919.

'WALTER E. EMERY, OF I'EOB'IA, ILLINOIS.

NUT-LOCK.

Speciflcation of Lettersatent.

Patented May 13, 1919.

Application flled March 2, 1918. Serial No. 220,018.

To all whom z't may concern:

Be it known that I, WALTER E. EMERY, a citizen of the United States,residing at Peoria, in the county'of Peoria and State of Illinois, haveinvented new and useful Improvements in Nut-Locks, of .which thefollowing is a specificaton.

This invention relates to a means for locking a nut on a bolt and hasfor its object to produce a compreible nut designed, when screwed on abolt to co-engage with a washer whereby the said nut will be compressedagainst the bolt to lock both the nut and bolt a ainst turning.

In 't e drawings I have illustrated 'a simple and satisfactor7`embodiment of the 1m- I provement, and in the drawings,l

Figure 1 is a side elevation of the' improvement, parts being insection, and the nut being out of engagement with the Washer.

Fig. 2 is a'similar. view but showing the nut engaged by the washer andcompreed against the bolt.

' Fig. 3 is a perspective view of the nut. Fig. 4 is a similar view ofthe washer. The bolt l is of the ordinaryconstruction V and is designed,as illustrated in Figs. 1 and 2 of the drawings, to pass through theplates of a super-structure S.

On the threaded end of the bolt 1 is arrange'd a washer 2, the samehaving one of 1ts faces formed with prongs 3 that enter one of the-plates of the super-structure. 'The bore or central opening of thewasher defines a comparatively straight portion 11 entering 'from theface of the washer provided with the prongs, and a dished or concavedportion 5 communicating, of course, with the portion 11 and with theouter face of the Washer. The vboreior opening defining the round wallor surface 5 vand the. straight wall or surface 11, is provided atspaced intervals With ribs (3 disposed'in radial planes. These ribs arecomparatively slight and are substantially V-shaped in cross section,thus poviding each of the same with a sharpened e ge.

Screwed on the bolt 1 is a nut 7. This nut has its inner face providedwith a conical extension -which is concaved, as at 8 and which is'provided with a single groove or depression 9. The groove 9 has itsside wall beveled inwardly SQ Ian unscrewing direction.

that the said groove is' of a substantally V-shape forniation. The nutis slit'lengthwise on one of the sides thereof providing a longitudinalopening 10. The convexed mouth provided at the rounded surface 5 in theopening or bore of the washer 2, does not exactly conform to the Shapeof the eoncaved end of the nut, so that the vouter and reduced portionof the concave surface 8 of the nut will first engage With thecomparatively straight surface l1 when the nut is i in the bore of thewasher, being screwed homeupon the bolt. The ribs 6 contacting with thereduced end ofvthe nut will have a tendency to force the confrontingsurfaces provided by the slot or opening 10 in the nut toward each otherto compress the` threads in the bore of the nut against the threads ofthe bolt, and -wh'en pressure is relieved from the nut the notch orgroove 9 y will be arranged in a position toy receive one of the ribs 6,thus effectively loclin the nut on the washer and also the nut inrictional engagement with the bolt.

While- I have illustrated nut as provided with a concaved face and thewasher provided with a convexed ysurface to receive the said face, it isto be understood that therelative faces of-these elements may bereversed so that the Washer may have its outer` face concaved and theinner face of from the foregoing description, when taken in connectionwith the drawings the simplicity and advantages of the construction willbe app-arent, it being thought merely necessary to state that the nutmay be rem'oved from engagement with the Washer and with the bolt byturning the said nut in Having thus described the invention what I claimis:

The combination with a bolt, of looking means therefor including awasher having an opening of a greater area than the cross sectionaldiameter of the bolt, said washer, upon the inner face thereof havingprongs and havingits outer face provided with a rounded depressioncommunicating with the opening and providing a convex surface, ribsdisposed in radial planes formed on the concaved surface and on the wallof the opening and conforming to the Shape of both of said surfaces, asplit nut for the bolt and washer,

and described the said nut having its inner end provided With a conlcalextension which is concaved and z which is of a slighty difierentContour than is screwed on the bolt and the slitted portion thereoiIcompressed by vcontacting engageoment between the bore of the Washer andthe 10 i concaved extension of the nut.

In testimony whereof I affix my signature.

WALTER 'EMERY.

